Improvement in saws for sawing stone



sys; Mnfnsou` Saws for SawingA Stone.

'N0]55,]65 Patented Sept.22v,1874.v

THE GRAFHICCU. PHOTO L|TH.39& 4X PARK PLACE, MY.

UNITED STATES PATENT OFFICE.

SAMUEL G. MORRISON, OF VILLIAMSPORT, PENNSYLVANIA.

IMPROVEMENT IN SAWS FOR SAWING STONE.

Specification forming part of Letters Patent No. [55.165, datedSeptember 22, 1874; application tiled April 2, 1874.

To all whom it may concern:

Be it known that I, SAMUEL G. MORRISON, of the city of Williamsport,Lycoming county, State of Pennsylvania, have invented an Improvement inSaws for Sawing Stone, of which the following is a speciiication:

The object of my invention is to rapidly saw and divide into slabs andblocks marble, slate, and other rocks, for manufacturing and economicalpurposes, bythe use of a saw in lineal or disk form, toothed With emeryor other hard substance, pulverized, and mixed with alumina or othercementing matter, pressed and solidifled into triangular spaces cut inthe sawblade, beveled on both sides like unto a knifeblade, for thepurpose of securing the emeryteeth in place. These spaces, lled withemery, point down when the saw is in use, and resemble ordinary woodsawteeth. As the emery-teeth wear, the particles are caught by the metalspaces between the teeth and carried back and forth, also cutting thestone.

My usual mode of making my stone-saw is as follows, to wit: I take asheet of soft metaliron, brass, or copper-of any desired length,

breadth, and thickness, and cut out at proper distances in triangularspaces, in form of the teeth of a crosscut Wood-saw. Both sides of theedge of these triangular spaces are beveled at a sharp angle. Securingthe sawblade thus prepared on a smooth flat surface, I tamp into eachspace a stili' cement of emery, filling each space even with the surfaceof the saw-blade, then allow it to dry, and afterward bake or burn it. y

The accompanying drawing shows a partlytoothed saw.

Figure l-a a are spaces not filled. Fig. 2 is a cross-sectionof thesaw-blade, showing the double bevel of the edge of the spaces for theteeth.

I claim as my invention- A stone-saw, substantially as described,consisting of a metal blade, With the emery-teeth inserted therein.

SAMUEL G. MORRISON.

Witnesses: l

E. C. WEAVER, J. P., E. M. FINCH.

